diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 1cfc500b..babcdedb 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -42,7 +42,7 @@ android {
 
         getByName("release") {
             isMinifyEnabled = true // Enabling minify, test of reproducibility
-            isShrinkResources = false
+            isShrinkResources = true
 
             proguardFiles("proguard-rules.pro")
         }
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index cf17f063..b7efb780 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -37,4 +37,4 @@
 -dontwarn org.xmlpull.v1.XmlPullParserFactory
 
 # Keeping names of classes that produce undeterministic results
--keepnames class java.util.*
+-keepnames class **